This great value compact fluorescent CFL tubular light bulb energy saver uses only 11W of electricity but has a light output equivalent to a standard 60W light bulb. Features a ES-E27 Edison screw (27mm) base/cap.The compact triple-loop design is just a few mm longer than a standard light bulb making it ideal for use in small table light bulbs. Not suitable for dimming.Need more help in choosing a suitable light bulb? Read our guide Choosing Compact Fluorescent Lamps